Enrique Zamarripa, father of Dallas police Officer Patrick Zamarripa, on Monday filed a 43-page lawsuit in the U.S. District Court of the Northern District of Texas against the Black Lives Matter organization.

Enrique Zamarripa’s lawsuit claims that Johnson, the Dallas shooter, was “acting as an agent of and at and under the direction of” the defendants.

The suit claims Micah Johnson shot at officers because he was incited by the defendants’ anti-police rhetoric. They have convinced their supporters “that there is a civil war between blacks and law enforcement, thereby calling for immediate violence and severe bodily injury or death,” the suit says.

Patrick Zamarripa, 32, was working on bicycle patrol the night of July 7, when hundreds marched through downtown Dallas, protesting the recent shootings of African-Americans by police.